- Added Coordinated Leader Election as Alpha under the `CoordinatedLeaderElection` feature gate. With the feature enabled, the control plane can use LeaseCandidate objects (coordination.k8s.io/v1alpha1 API group) to participate in a leader election and let the kube-apiserver select the best instance according to some strategy. ([#124012](https://github.com/kubernetes/kubernetes/pull/124012), [@Jefftree](https://github.com/Jefftree))...

    *   Transpose now supports 6D tensors.
    *   Float LSTM now supports diagonal recurrent tensors: https://arxiv.org/abs/1903.08023

*   `tf.experimental.dtensor`:

    *   Coordination service now works with `dtensor.initialize_accelerator_system`, and enabled by default.
    *   Add `tf.experimental.dtensor.is_dtensor` to check if a tensor is a DTensor instance.

*   `tf.data`:

* `deployments/rollback` is now passed through validation/admission controllers ([#72271](https://github.com/kubernetes/kubernetes/pull/72271), [@jhrv](https://github.com/jhrv))
* The `Lease` API type in the `coordination.k8s.io` API group is promoted to `v1` ([#72239](https://github.com/kubernetes/kubernetes/pull/72239), [@wojtek-t](https://github.com/wojtek-t))

- The namespace editors and admins can now create leases.coordination.k8s.io and should use this type for leaderelection instead of configmaps. ([#111472](https://github.com/kubernetes/kubernetes/pull/111472), [@deads2k](https://github.com/deads2k))

- Autoscaling/v2beta1 is deprecated in favor of autoscaling/v2beta2 ([#90463](https://github.com/kubernetes/kubernetes/pull/90463), [@deads2k](https://github.com/deads2k)) [SIG Autoscaling]
- Coordination.k8s.io/v1beta1 is deprecated in 1.19, targeted for removal in 1.22, use v1 instead. ([#90559](https://github.com/kubernetes/kubernetes/pull/90559), [@deads2k](https://github.com/deads2k)) [SIG Scalability]

- Namespace editors and admins can now create leases.coordination.k8s.io and should use this type for leaderelection instead of configmaps. ([#111515](https://github.com/kubernetes/kubernetes/pull/111515), [@deads2k](https://github.com/deads2k)) [SIG API Machinery and Auth]